/*
 * Copyright (C) 2009 eXo Platform SAS.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.everrest.core.tools;

import org.everrest.core.ContainerResponseWriter;
import org.everrest.core.GenericContainerResponse;
import org.everrest.core.impl.OutputHeadersMap;

import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.MessageBodyWriter;
import java.io.ByteArrayOutputStream;
import java.io.IOException;

/**
 * Mock object that can be used for any tests.
 *
 * @author <a href="mailto:andrew00x@gmail.com">Andrey Parfonov</a>
 * @version $Id$
 * @see ContainerResponseWriter
 */
public class ByteArrayContainerResponseWriter implements ContainerResponseWriter {
    /** Message body. */
    private byte[] body;

    /** HTTP headers. */
    private MultivaluedMap<String, Object> headers;

    private boolean committed;

    /** {@inheritDoc} */
    @SuppressWarnings({"unchecked", "rawtypes"})
    public void writeBody(GenericContainerResponse response, MessageBodyWriter entityWriter) throws IOException {
        if (committed) {
            return;
        }
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        Object entity = response.getEntity();
        if (entity != null) {
            entityWriter.writeTo(entity, entity.getClass(), response.getEntityType(), null, response.getContentType(),
                                 response.getHttpHeaders(), out);
            body = out.toByteArray();
        }
    }

    /** {@inheritDoc} */
    public void writeHeaders(GenericContainerResponse response) throws IOException {
        if (committed) {
            return;
        }
        headers = new OutputHeadersMap(response.getHttpHeaders());
        committed = true;
    }

    /** @return message body */
    public byte[] getBody() {
        return body;
    }

    /** @return HTTP headers */
    public MultivaluedMap<String, Object> getHeaders() {
        return headers;
    }

    /** Clear message body and HTTP headers map. */
    public void reset() {
        body = null;
        headers = null;
        committed = false;
    }
}
